Detecting touch user interface on a display under partial wet conditions

Abstract

An electronic device disclosed herein is adapted to determine a location of touch input when liquid is present. The electronic device may include a force detection assembly having force detection units. When a touch input is applied to the display layer, the force detection units generates a differential capacitance that is used to determine a location of the touch input. The electronic device may further include a confidence interval algorithm that uses the location and builds a confidence interval around the location. The electronic device may include a touch input components that can determine whether the liquid is present. The confidence interval algorithm determines whether the liquid is present within the confidence interval and provides an updated location of the touch input. The electronic device further includes a machine learning algorithm designed predict a software application the user intends to select using the touch input.

What is claimed is: 
     
       1. A wearable electronic device, comprising:
 a transparent layer; 
 a touch input component covered by the transparent layer, the touch input component configured to determine whether a liquid is in contact with the transparent layer; 
 a force detection assembly to determine a first location of a touch input having an input location on the transparent layer and an amount of force applied to the transparent layer from the touch input; 
 a memory circuit; and 
 a confidence interval algorithm stored on the memory circuit that, when accessed by a processor, generates a confidence interval centered around the first location and determines a second location of the touch input based on the first location when the liquid is in contact with the transparent layer within the confidence interval, the confidence interval including a circular area of the transparent layer, the area having a radius, wherein the size of the radius is at least partially based on the amount of force applied to the transparent layer. 
 
     
     
       2. The wearable electronic device of  claim 1 , wherein the second location defines a user input to a display assembly that selects an icon presented on the display assembly. 
     
     
       3. The wearable electronic device of  claim 1 , wherein the force detection assembly comprises:
 a first force detection unit that measures a first capacitance based upon the amount of applied force; and 
 a second force detection unit that measures a second capacitance based upon the amount of applied force, wherein the first location is determined by a differential capacitance between the first capacitance and the second capacitance. 
 
     
     
       4. The wearable electronic device of  claim 1 , further comprising:
 an enclosure that is coupled with the transparent layer; and 
 a first band and a second band, the first band and the second band connected to the enclosure and configured to secure the enclosure to a user. 
 
     
     
       5. The wearable electronic device of  claim 1 , wherein the liquid comprises multiple liquid droplets, and wherein the confidence interval algorithm determines the second location when at least one liquid droplet is within the confidence interval. 
     
     
       6. The wearable electronic device of  claim 5 , wherein the confidence interval algorithm determines a location of a liquid droplet that is closest to the first location, and determines the second location as the location of the liquid droplet. 
     
     
       7. The wearable electronic device of  claim 1 , wherein the force detection assembly is adhesively coupled to the transparent layer. 
     
     
       8. The wearable electronic device of  claim 1 , wherein the radius of the confidence interval is inversely proportional to the amount of force applied to the transparent layer. 
     
     
       9. A wearable electronic device, comprising:
 an enclosure; 
 a display assembly comprising a display layer to display icons that represent software applications and a touch input component that detects an input location of a user touch input; 
 a confidence interval algorithm to generate a confidence interval including an area of the display assembly centered around the input location and having a radius and determine a second location based on a location of a liquid that at least partially covers the display assembly as detected by the touch input component when the location of the liquid is at least partially within the confidence interval. 
 
     
     
       10. The wearable electronic device of  claim 9 , further comprising:
 a transparent layer coupled to the enclosure and covering the display assembly; and 
 a force detection assembly to determine an amount of applied force from the user touch input. 
 
     
     
       11. The wearable electronic device of  claim 10 , wherein the force detection assembly comprises:
 a first force detection unit that measures a first capacitance based upon an amount of applied force by the user touch input; and 
 a second force detection unit that measures a second capacitance based upon the amount of applied force. 
 
     
     
       12. The wearable electronic device of  claim 11 , wherein the input location is determined by a differential capacitance between the first capacitance and the second capacitance. 
     
     
       13. The wearable electronic device of  claim 12 , wherein the display layer is positioned between the first force detection unit and the second force detection unit. 
     
     
       14. The wearable electronic device of  claim 9 , wherein the enclosure defines an internal volume encompassing a processor circuit that executes instructions of the confidence interval algorithm. 
     
     
       15. The wearable electronic device of  claim 9 , wherein the enclosure defines an internal volume encompassing a memory circuit that stores the instructions of the confidence interval algorithm. 
     
     
       16. A method for selecting an icon on a display assembly of a wearable electronic device when a liquid is present on the display assembly, the method comprising:
 determining, by a force detection assembly, a first location of a touch input on the display assembly and an amount of force applied to the display assembly by the touch input; 
 determining, by a touch input component of the display assembly, the presence of the liquid on a transparent layer that covers the display assembly; and 
 determining, by a confidence interval algorithm, a second location of the touch input based on confidence interval surrounding the first location, the confidence interval including a circular area centered around the first location and having a radius, and the determination of the presence the liquid. 
 
     
     
       17. The method of  claim 16 , wherein determining, by the confidence interval algorithm, the second location of the touch input comprises generating a user input location based on the first location. 
     
     
       18. The method of  claim 17 , wherein determining, by the confidence interval algorithm, the second location of the touch input further comprises generating a confidence interval around the user input location. 
     
     
       19. The method of  claim 18 , wherein determining, by the confidence interval algorithm, the second location of the touch input further comprises determining whether the liquid is present at least partially within the confidence interval. 
     
     
       20. The method of  claim 19 , wherein the second location corresponds to a location of the liquid.